#include <stdio.h>

int main(void) {
    int a,b,c,max;
    printf("input a,b,c:");
    scanf("%d%d%d",&a,&b,&c);
    max = a;
    if(max < b)max = b;
    if(max < c)max = c;
    printf("max = %d\n",max);
	return 0;
}